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Intangible Assets - Summary of Intangible Assets (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | $ 262.4 |
Beginning Balance | 247.7 | $ 262.4
Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 430.5 | 590.5
Additions arising on acquisitions | 33.0 | 6.1
Discontinued operations (note 8) | (29.4) |
Removal of fully amortized assets | (79.7) | (38.8)
Impact of foreign exchange | 18.4 | (26.4)
Beginning Balance | 406.0 | 430.5
Gross carrying amount [member] | Not internally generated [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Additions | 33.2 | 5.7
Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (168.1) | (141.0)
Amortization - continuing operations | (66.1) | (74.8)
Amortization - discontinued operations | (5.7) | (7.3)
Discontinued operations (note 8) | 9.2 |
Removal of fully amortized assets | 79.7 | 38.8
Impact of foreign exchange | (7.3) | 5.2
Beginning Balance | (158.3) | (168.1)
Client relationships [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 199.1 |
Beginning Balance | 191.1 | 199.1
Client relationships [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 289.5 | 399.0
Additions arising on acquisitions | 25.1 | 3.2
Discontinued operations (note 8) | (19.7) |
Removal of fully amortized assets | (3.9) | (13.8)
Impact of foreign exchange | 16.3 | (20.8)
Beginning Balance | 307.3 | 289.5
Client relationships [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (90.4) | (85.0)
Amortization - continuing operations | (26.9) | (28.2)
Amortization - discontinued operations | (1.8) | (2.0)
Discontinued operations (note 8) | 4.9 |
Removal of fully amortized assets | 3.9 | 13.8
Impact of foreign exchange | (5.9) | 3.8
Beginning Balance | (116.2) | (90.4)
Contract backlog [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 10.3 |
Beginning Balance | 4.9 | 10.3
Contract backlog [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 47.9 | 55.5
Additions arising on acquisitions | 5.7 | 2.7
Removal of fully amortized assets | (46.2) | (6.2)
Impact of foreign exchange | 1.1 | (4.1)
Beginning Balance | 8.5 | 47.9
Contract backlog [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (37.6) | (19.2)
Amortization - continuing operations | (9.9) | (22.3)
Amortization - discontinued operations | (1.4) | (4.1)
Removal of fully amortized assets | 46.2 | 6.2
Impact of foreign exchange | (0.9) | 1.8
Beginning Balance | (3.6) | (37.6)
Software [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 38.7 |
Beginning Balance | 42.5 | 38.7
Software [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 65.6 | 97.6
Additions arising on acquisitions | 0.2 |
Discontinued operations (note 8) | (5.3) |
Removal of fully amortized assets | (18.8) | (15.7)
Impact of foreign exchange | 0.3 | 0.4
Beginning Balance | 75.2 | 65.6
Software [member] | Gross carrying amount [member] | Not internally generated [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Additions | 33.2 | 5.7
Software [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (26.9) | (28.2)
Amortization - continuing operations | (25.7) | (16.4)
Amortization - discontinued operations | (0.7) | (0.8)
Discontinued operations (note 8) | 1.9 |
Removal of fully amortized assets | 18.8 | 15.7
Impact of foreign exchange | (0.1) | (1.0)
Beginning Balance | (32.7) | (26.9)
Other [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 14.3 |
Beginning Balance | 9.2 | 14.3
Other [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 27.5 | 38.4
Additions arising on acquisitions | 2.0 | 0.2
Discontinued operations (note 8) | (4.4) |
Removal of fully amortized assets | (10.8) | (3.1)
Impact of foreign exchange | 0.7 | (1.9)
Beginning Balance | 15.0 | 27.5
Other [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (13.2) | (8.6)
Amortization - continuing operations | (3.6) | (7.9)
Amortization - discontinued operations | (1.8) | (0.4)
Discontinued operations (note 8) | 2.4 |
Removal of fully amortized assets | 10.8 | 3.1
Impact of foreign exchange | (0.4) | 0.6
Beginning Balance | (5.8) | (13.2)
Lease disadvantages [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (2.7) |
Beginning Balance | (1.5) | (2.7)
Lease disadvantages [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | (7.2) | (10.3)
Removal of fully amortized assets | 3.1 | 2.5
Impact of foreign exchange | (0.3) | 0.6
Beginning Balance | (4.4) | (7.2)
Lease disadvantages [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Beginning Balance | 4.5 | 5.5
Amortization - continuing operations | 1.1 | 1.8
Amortization - discontinued operations | 0.1 | 0.1
Removal of fully amortized assets | (3.1) | (2.5)
Impact of foreign exchange | 0.3 | (0.4)
Beginning Balance | $ 2.9 | 4.5
Innovyze, Inc. [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (103.3)
Innovyze, Inc. [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | 8.3
Innovyze, Inc. [member] | Client relationships [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (78.1)
Innovyze, Inc. [member] | Client relationships [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | 7.2
Innovyze, Inc. [member] | Software [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (19.1)
Innovyze, Inc. [member] | Software [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | 1.1
Innovyze, Inc. [member] | Other [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (6.1)
Other [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (3.3)
Other [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | 2.7
Other [member] | Software [member] | Gross carrying amount [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | (3.3)
Other [member] | Software [member] | Accumulated depreciation and amortization [member] |  |
Disclosure of detailed information about intangible assets [line Items] |  |
Disposals |  | $ 2.7

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